Page 182 - BUKU SYNOPSIS

between >3% and <8%. The researcher also tested the consistency among

raters by using interrater coefficient correlation (ICC) analysis through

SPSS version 29. The analysis reveals that the Cronbach Alpha is .902

(categorized “excellent”), and ICC is .802 (classified “very good”).

b) Self- Assessment Instrument

During the teaching-learning process, the students firstly assessed

their text followed by their peer assisted guided by the SA and PA

instruments. Both instruments have four scales representing the result of the

students’ text based on their reviews. The validity and reliability of

persons/participants and items from self-assessment instruments are

examined utilizing three output data results from the Rasch Model using

Winstep software.

1) Construct validity

The Rasch model's item fit analyzes the quality of the instrument’s

items to the model. Item fit explains whether or not the instrument items

work properly. The requirement for declaring an item fit is that at least one

item is within the allowed limits, hence the item does not need to be removed

(Sumintono & Widhiarso, 2015; Yudiarso, 2023).

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